CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 22,937	$ 14,163
Accounts receivable, net	390,008	387,530
Inventories	128,203	140,867
Deferred income taxes	7,171	5,777
Income taxes receivable	15,088	4,234
Prepaid expenses	5,116	10,762
Other current assets	3,406	4,494
Total current assets	571,929	567,827
Property, plant and equipment, net	736,829	756,326
Goodwill	24,093	24,093
Other assets	19,478	18,917
Total assets	1,352,329	1,367,163
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	116,318	109,846
Accrued payroll and related expenses	33,326	32,053
Accrued insurance expenses	5,880	6,152
Accrued state, local and other taxes	8,862	7,326
Income taxes payable	168	6,428
Other accrued expenses	1,184	2,706
Total current liabilities	165,738	164,511
Long-term accrued insurance expenses	10,989	10,400
Notes payable to banks	51,400	107,000
Long-term pension liabilities	28,076	26,543
Deferred income taxes	146,035	155,007
Other long-term liabilities	3,140	4,470
Total liabilities	405,378	467,931
Common stock	21,904	22,014
Capital in excess of par value
Retained earnings	939,336	891,464
Accumulated other comprehensive loss	(14,289)	(14,246)
Total stockholders' equity	946,951	899,232
Total liabilities and stockholders' equity	$ 1,352,329	$ 1,367,163